Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6369a2887a1b35fde91573adc650528e3efea8e9
Commit: 6369a2887a1b35fde91573adc650528e3efea8e9
Parent: 1d5f2c16c6125ae6da1435ac5a190ae08429902a
Author: Rudolf Marek <[EMAIL PROTECTED]>
AuthorDate: Fri Jan 18 00:42:54 2008 +0100
Committer: Mark M. Hoffman <[EMAIL PROTECTED]>
CommitDate: Sun Feb 17 10:21:39 2008 -0500
hwmon: (coretemp) Add maximum cooling temperature readout
Following patch will add reporting of maximum temperature, at which all fans
should spin full speed. It may be non-physical temperature on
Desktop/Server CPUs.
Signed-off-by: Rudolf Marek <[EMAIL PROTECTED]>
Acked-by: Jean Delvare <[EMAIL PROTECTED]>
Signed-off-by: Mark M. Hoffman <[EMAIL PROTECTED]>
---
Documentation/hwmon/coretemp | 3 ++-
drivers/hwmon/coretemp.c | 34 ++++++++++++++++++++++++++++++----
2 files changed, 32 insertions(+), 5 deletions(-)
diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp
index 170bf86..7fb7441 100644
--- a/Documentation/hwmon/coretemp
+++ b/Documentation/hwmon/coretemp
@@ -25,7 +25,8 @@ may be raised, if the temperature grows enough (more than
TjMax) to trigger
the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
temp1_input - Core temperature (in millidegrees Celsius).
-temp1_crit - Maximum junction temperature (in millidegrees Celsius).
+temp1_max - All cooling devices should be turned on (on Core2).
+temp1_crit - Maximum junction temperature (in millidegrees Celsius).
temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
Correct CPU operation is no longer guaranteed.
temp1_label - Contains string "Core X", where X is processor
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 3ee60d2..52914e9 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -38,7 +38,8 @@
#define DRVNAME "coretemp"
-typedef enum { SHOW_TEMP, SHOW_TJMAX, SHOW_LABEL, SHOW_NAME } SHOW;
+typedef enum { SHOW_TEMP, SHOW_TJMAX, SHOW_TTARGET, SHOW_LABEL,
+ SHOW_NAME } SHOW;
/*
* Functions declaration
@@ -55,6 +56,7 @@ struct coretemp_data {
unsigned long last_updated; /* in jiffies */
int temp;
int tjmax;
+ int ttarget;
u8 alarm;
};
@@ -93,9 +95,10 @@ static ssize_t show_temp(struct device *dev,
if (attr->index == SHOW_TEMP)
err = data->valid ? sprintf(buf, "%d\n", data->temp) : -EAGAIN;
- else
+ else if (attr->index == SHOW_TJMAX)
err = sprintf(buf, "%d\n", data->tjmax);
-
+ else
+ err = sprintf(buf, "%d\n", data->ttarget);
return err;
}
@@ -103,6 +106,8 @@ static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp,
NULL,
SHOW_TEMP);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, NULL,
SHOW_TJMAX);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL,
+ SHOW_TTARGET);
static DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL);
static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_name, NULL, SHOW_LABEL);
static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, SHOW_NAME);
@@ -223,8 +228,26 @@ static int __devinit coretemp_probe(struct platform_device
*pdev)
platform_set_drvdata(pdev, data);
+ /* read the still undocumented IA32_TEMPERATURE_TARGET it exists
+ on older CPUs but not in this register */
+
+ if (c->x86_model > 0xe) {
+ err = rdmsr_safe_on_cpu(data->id, 0x1a2, &eax, &edx);
+ if (err) {
+ dev_warn(&pdev->dev, "Unable to read"
+ " IA32_TEMPERATURE_TARGET MSR\n");
+ } else {
+ data->ttarget = data->tjmax -
+ (((eax >> 8) & 0xff) * 1000);
+ err = device_create_file(&pdev->dev,
+ &sensor_dev_attr_temp1_max.dev_attr);
+ if (err)
+ goto exit_free;
+ }
+ }
+
if ((err = sysfs_create_group(&pdev->dev.kobj, &coretemp_group)))
- goto exit_free;
+ goto exit_dev;
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
@@ -238,6 +261,8 @@ static int __devinit coretemp_probe(struct platform_device
*pdev)
exit_class:
sysfs_remove_group(&pdev->dev.kobj, &coretemp_group);
+exit_dev:
+ device_remove_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr);
exit_free:
kfree(data);
exit:
@@ -250,6 +275,7 @@ static int __devexit coretemp_remove(struct platform_device
*pdev)
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &coretemp_group);
+ device_remove_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr);
platform_set_drvdata(pdev, NULL);
kfree(data);
return 0;
-
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